With the development of science and technology, the production and processing of many industrial products put forward extremely high requirements for the dust concentration in the production environment, which requires a certain air cleanliness level in the production environment and the supply quality of various related substances required to control the production process. For example, in film production, if the film is contaminated with dust, emulsion oxidation, weakening activity, pH change, etc., will affect the photosensitive performance of the film.